Electric cut-out.



Patented Dec. 19, 1911.

T. E. MURRAY.

ELECTRIC OUT-OUT. APPLIUATION FILED 11111:: 29.1911.

UNITED STATES PATENT OFFICE.

THOMAS -E. MURRAY, OF NEW.YOBK, N. Y.

ELECTRIC CUT-OUT.

1,01 2,145. Specification of Letters Patent. Patented Dec. 19, 1911.

' Application filed June 29, 1911. Serial No. 636,015.

To all whom it may concern:

Be it known that I, THOMAS E. MURRAY, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented a certain new and useful Improvement in Electric Cut-Outs,of which the following is a specific'ation.

The invention is an electric cut-out, more especially intended for usewith heavy currents, and comprises a base block, circuit terminalsthereon, a separately removable fuse case in contact with one of saidterminals and protruding from said base block, and a cup-sha ed cover orenvelop of insulating materiaFadapted to be grasped by the hand of theoperator and receiving the protruding portion of said fuse, and providedwith means for closing circuit from the other circuit terminal to saidfuse.

In the accompanying drawingsFigure 1 is a side elevation of my im Jrovedcut-out. Fig. 2 is a vertical section tiereof. Fig. 3 is a bottom viewof the cover, and Fig.4 is a top view of the base block with the coverremoved.

Similar numbers of reference indicate like parts.

1 is the base block, preferably of refractory insulating material, suchas porcelaim.

rovided with two recesses 2, 3, separated y a partition 4,. In thebottom of the recess 2 is a socket to receive the metallic cap or endpiece 5 of the cartridge fuse case (5. Within said socket is a contactplate 7, secured in place by screw 8, which extends over the bottom ofrecess 2. The terminal 9 of a circuit conductor is connected to plate 7by an arched late 10 secured to .plate 7 by screws 11. In the recess 3are two contact plates 12, 13 secured together by screw 14 and upwardlybent to form a s ring clip at, 15. To the upper contact gate 12 t eterminal 16 of a circuit conuctor is secured by an arched plate 17attached to plate 12 by screws 18. The cup shaped cover or fuse caseenvelop 19 is also of refractory insulating material, and is providedwith flanges 20 to extend over the recesses 2, 3. Between the cover andthe base block an elastic gasket 21 may be interposed. The fuse case 6,when placed vertically in the socket in recess 2, protrudes from thebase block and is received in said cover when said cover is in place onthe base block. Within the cover is a partition 22 which, when saidcover is in place, registers with the partition 4 in the base block, andwhich divides the space within the cover into two compartments. Saidpartition may enter at its edges and be secured in grooves in the coveras shown, in Fig. 3. A contact plate 23 in the compartment containingthe fuse case extends over the edge of partition 22 into the adjacentcompartment, so that said partition lies in the loo formed by saidplate, and protrudes elow the cover, as shown at 24. When the cover isin place on the base block, the protruding portion 24 enters the clip15, and the upper end of the fuse case 6 makes contact wit said plate23; so that circuit is established from. terminal 16, to clip 15, plate23, through the fuse in case 6, to plate 7 and opposite terminal 9. Inorder to retain the cover in place, a bail 25 pivoted in the base block,is swung over the top of said cover, forcing the same closely down uponthe elastic gasket 21.

The terminals 9 and 16 form the cores of a cable which has an envelop 26of insulating material and an outer lead sheathing 27. The cable endsare secured in the base block in the following manner: The envelop 26and sheathing 27 are removed to expose the terminals 9, 16. The cableend is then inserted in a shouldered recess in the wall of the baseblock, until the cable covering meets the bottom of said recess. Thespace in the recess outside of the cable is then filled with lead floss28, which is packed therein into a substantially solid mass. In thisway, I form perfectly moisture-proof joints between the base block andthe cable.

The partition 22 forms a barrier or screen between the fuse and theterminal 16, so that even with heav currents there can be no sparking orlea (age between the fuse nd said terminal, or across the loop formed byplate 23, in which'loop said screen is placed. It is also to be notedthat by takmg off of the cover, the fuse is at once cut out of circuit,and inasmuch as the fuse case amply protrudes from its sup ort, (it is,of course, immaterial whether t e i' use case remains retained at oneend or the other in cover or base block) it may be easily and safelyremoved. No possible risk is incurred by the operator however unskilled,since all he has to do is to release the bail, grasp the cup-shapedcover of porcelain or the like,

the flanges of which shield the lower part of his hand, and lift thecover from the base block. And conversely, circuit connection is notreestablished until the cover is pushed down sufficiently far to bringthe u per end of the fuse case into contact with p ate '23.

I claim:

1. A base block of refractory insulating material, circuit terminalsthereon, a cover, a partition in said cover-dividing the samelongitudinally int-o two compartments, and a contact plate extendingaround said partition and having one end terminating in one of saidcompartments and the other end protruding beyond the other compartment.

2. An electric cut-out comprising a base block, circuit terminalsthereon, a cup shaped cover for said block, a contact plate within andprotruding below said cover and terminating near the top thereof, and are movable fuse case entering said cover and said base block and closingcircuit at its ends with said contact plate in said cover and a circuitterminal in said base: the said contact plate at its protruding endclosing circuit with the other of said circuit terminals in said base.

3. An electric cu.tout, comprising a base block, having two sockets,circuit terminals in said sockets, a cover, and in said cover aseparately removable fuse case, and a conducting strip making contactwith one fuse case terminal; the said fuse and strip both projectingbelow said cover and making contact respectively with said circuitterminals when said cover is in place on said base block.

In testimony whereof I have afiixed my signature in presence of twowitnesses.

THOMAS E. MURRAY.

Witnesses (imrrnnna T. PoRTER, MAY T. MQGARRY.

